Somehow Kindle got ahold of my card information and has been charging me the last two months. I don't even own a Kindle. When I called them, they told me I had signed up for a "free trial" and did I want to cancel it? I seriously don't recall signing up for any such thing! Regardless, after much discussion, they refunded me the last two months charges. Be careful with your card and keep an eye on your bill.
Back to the topic, I had a real free trial for Creative Bug and I wasn't that thrilled with what they had to offer. I think the lessons were a lot more basic than what other sites have.
Watson